<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
	String basePath = request.getScheme() + "://"
			+ request.getServerName() + ":" + request.getServerPort()
			+ request.getContextPath() + "/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<base href="<%=basePath%>">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<title>member.jsp</title>
</head>
<body>

<h2>javax.servlet.http.HttpSession - session 对象</h2> 
<% 
String Login = (String)session.getAttribute("Login");

if (Login != null && Login.equals("OK")) { 
out.println("欢迎进入");
session.invalidate(); 
} 
else { 
out.println("请先登录，谢谢") ;
out.println("<br>经过五秒之后，网页会自动返回login.jsp");

response.setHeader("Refresh","5;URL=login.jsp"); 
}
%>

</body>
</html>